Gettysburg Weather in September

What's the weather like in Gettysburg (South Dakota) in September 2025?

The climate in Gettysburg during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Gettysburg and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 8°C (46°F) is normal.

Gettysburg weather averages (imperial / metric)
Daytime temperature 23.6°C 74.4°F
Nightly temperature 7.9°C 46.1°F
Average temperature 15.7°C 60.3°F
Daily sunshine 9.2 hrs
Avg rainfall 36 mm 1.4 ins
Rainy days 7 days
Sea temperature 15.6°C 60°F
Humidity 63%
Windspeed 17.3kph 11 mph

On average September is the 6th wettest month of the year in Gettysburg with around 36mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.2 hours of sunshine per day.

September temperatures in Gettysburg

Gettysburg average temperature in September

September rainfall

Gettysburg average rain in September

September hourly sunshine

Gettysburg average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Gettysburg in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Gettysburg weather stats

Gettysburg weather statistics
Hottest month: July 30.5°C 86.9°F
Driest month: January 8mm 0.3ins
Sunniest month: July 12.3hrs
Coldest month: January -5°C 23°F
Wettest month: June 81mm 3.2ins
Map showing location of Gettysburg (45.01165, -99.95567) Gettysburg map pin © Google

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